Simplify `user.list_users` on Windows

 - 'None' is simplier than 'localhost' and coherent with `module.win_file`
 - Level 0 is enough as we just need the username
 - Remove useless log
Use win32 API to get user info in `user.info`

Issue #14679: Calling `net user <name>` and parsing it is broken
on non-English Windows because the output is i18nized.
Improve `user.info` output on Windows

 - Add 'uid' information
 - Use it to get userprofile from registry
 - Fallback 'home' to 'profile' if not set
Improve `user.getent` on Windows

 - Call `user.list_users` instead of duplicating the behavior
 - Get 'uid' directly from `user.version` result
Merge pull request #14804 from saltstack/bp-14694

Backport #14694 to 2014.7